Secondary battery.



No. 704,739.Y 1 Patented July l5, 1902.'

A Y .1. B. ENTz.

SECND'ARY BATTERY.

(Application med ont. s, 1900.)

(No Model.)`

mi: Normas PETERS ou.. vrmroufuo. wsmnemw. n. c.

UNITED STATESv PATENT OEEICE.

JUsTUs E. ENTZ, OE PHILADELPHIA, PENNSYLVANIA, AssIeNoR To THE ELECTRIC STORAGE `BATTERY COMPANY, .Y OE'PHILADELPIIIA, PENN- sYLvANIA, A CORPORATION OE `NEW JERSEY.

SECONDARY BATTERY.

SPECIFICATION forming part of Letters :PatentNo."'04-39,` dated July 15, 1.902. Application tiled October 3, 1900. Serial Nc. 31,903. (Nomodel.)

To @Z3 whom t may concer-n: l l

Be it known that I, JUSTUS B. ENTZ, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented'a certain new and useful Improvement in Secondaryor Storage Batteries, of which the following is a specification.

The commercialsuccess of automobiles propelled by electricity depends upon the' provision of storage-battery plates which shall have sufficient capacity and mechanical strength and which shall be characterized by a great degree of lightness in weight.-

It is the object of the present invention to provide a battery-plate well adaptedto meet the requirements of electric automobiles and which shall be exceedingly light, Of great electrical capacity in proportion to its weight', and of sufficient mechanical strength to withstand the uses for which it is intended.

To these and other ends hereinafter set forth the invention comprises the improvements hereinafter described and claimed.

In the drawings, Figure l is a section of a grid embodying features of the invention. Fig. 2 is an elevation of the grid partially pasted to constitute a batteryplate, and Figs. 3 and -t are respectively an elevation and a section of one other of the many types of grids in which my invention may be embodied.

In the embodiment of my invention the grid is constructed of rolled antimonious lead, which is malleable by reason of the rolling. Eight per cent. of antimony may be mentioned as a proportion productive of good results; but the invention is not limited to any particular amount. The rolled antimonious grid is non-active-that is to say, it is not in use oxidized-audit is therefore durable and remains intact and is not f formed, so that it retains its initial strengthduring the existence of the plate. If it were not for the presence of the antimony, the grid would become formed or peroxidized and mechanically weakened,vso that in a short time the plate as a Whole would lose its initial mechanical strength and become worthless. To the gridthere is applied active material or material to become active, and in order to secure the latter to` place tangs, keys, orrprojections are formed upon the grid, either by puncturing and then bending Or by bend'- ing Without puncturing or Otherwise. These provisions are essential to the efciency of the plate, because they serve to hold the active material or' material to become active to place in proper mechanical and electrical contact. The rolled antimoniOus-lead grid when of the minimum thickness lends itself to these provisions, Whereascast antimonious lead, because of its inherent brittleness and qualities, does'not do so. A

'Referring-teilig. l, the grid o consists of rolled antimonious lead. It is exceedingly thin,and for the sake of description its thicka ness may be one millimeter, more or less. It is inactive and while serving as a goed conductor is not itself oxidized or formed, so that it retains its mechanical strength, which is very much greater than that of pure lead of the same thickness, even before the latter is 4formed andY far in excess of the latter if formed. It is also bent to form keys b, which retain the active material cin goed mechanical and electrical Contact. Antimonious lead could not be cast of the thinness described, and if cast somewhat thicker the keys t could not be bent.. As shown in Figs. 3 and 4, the keys d are formed'by puncturing the grid and bending up the punctured portions.

It will be obvious to those skilled in the art to which the invention relates that modifications may be made inv details without departing from the spirit thereof. Hence I do not limit myself to the precise construction and arrangement of parts hereinabovev set forth and illustrated in the drawings; but,

Having thus described the nature and V0bjects of the invention, what I claim as new, and desire to secure by Letters Patent, is-e l. A lnalleated antiinonious-lead grid for a to form keys for holding the active material 1o storage battery plate, substantially as deor material to become active of a. storage-batsoribed. y tery plate, substantially as described.

2. Amalleated antimonious-lead grid punc- In testimony whereof I have hereunto 5 tured to form tangs or keys for holding the signed my neme.

active material or material to become active JUSTUS B. ENTZ. of a storage-battery plate, substantially as In presence ofl described. W. J; JACKSON,

3. A malleztted antimonous-lead grid bent K. M. GILLIGAN. 

